The McNaughton Cup gets you exactly nowhere.
The only teams that get into the F5 are the teams that win 2 games this week-end.
The team that wins the F5 (and other league championships) get an "autobid" into the NCAA tourny. In the history of the F5, this has not mattered, as every team that has won the F5, was already in the NCAA tourny by virtue of their standing in the Pairwise. That will hold true this year as well, unless CC, or one of the teams in the bottom 5 spots of the WCHA wins the F5.